diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2014-06-24 18:55:11 -0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2014-06-29 18:59:35 +0300 |
| commit | f2ae8abf1fa003e7ec6ee22cc3871924422a01d0 (patch) | |
| tree | b7c7f3bd2345af11289f489b939f544924070de8 | |
| parent | fa118d1f8be40860469e8e23745d0202bdf229ba (diff) | |
| download | qemu-f2ae8abf1fa003e7ec6ee22cc3871924422a01d0.zip | |
mc146818rtc: add rtc-reset-reinjection QMP command
It is necessary to reset RTC interrupt reinjection backlog if
guest time is synchronized via a different mechanism, such as
QGA's guest-set-time command.
Failing to do so causes both corrections to be applied (summed),
resulting in an incorrect guest time.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | hw/timer/mc146818rtc.c | 18 | ||||
| -rw-r--r-- | monitor.c | 7 | ||||
| -rw-r--r-- | qapi-schema.json | 12 | ||||
| -rw-r--r-- | qmp-commands.hx | 23 |
4 files changed, 60 insertions, 0 deletions
diff --git a/hw/timer/mc146818rtc.c b/hw/timer/mc146818rtc.c index 05002bf9d6..307732c744 100644 --- a/hw/timer/mc146818rtc.c +++ b/hw/timer/mc146818rtc.c @@ -27,6 +27,7 @@ #include "hw/timer/mc146818rtc.h" #include "qapi/visitor.h" #include "qapi-event.h" +#include "qmp-commands.h" #ifdef TARGET_I386 #include "hw/i386/apic.h" @@ -85,6 +86,7 @@ typedef struct RTCState { Notifier clock_reset_notifier; LostTickPolicy lost_tick_policy; Notifier suspend_notifier; + QLIST_ENTRY(RTCState) link; } RTCState; static void rtc_set_time(RTCState *s); @@ -523,6 +525,20 @@ static void rtc_get_time(RTCState *s, struct tm *tm) rtc_from_bcd(s, s->cmos_data[RTC_CENTURY]) * 100 - 1900; } +static QLIST_HEAD(, RTCState) rtc_devices = + QLIST_HEAD_INITIALIZER(rtc_devices); + +#ifdef TARGET_I386 +void qmp_rtc_reset_reinjection(Error **errp) +{ + RTCState *s; + + QLIST_FOREACH(s, &rtc_devices, link) { + s->irq_coalesced = 0; + } +} +#endif + static void rtc_set_time(RTCState *s) { struct tm tm; @@ -911,6 +927,8 @@ ISADevice *rtc_init(ISABus *bus, int base_year, qemu_irq intercept_irq) } else { isa_init_irq(isadev, &s->irq, RTC_ISA_IRQ); } + QLIST_INSERT_HEAD(&rtc_devices, s, link); + return isadev; } @@ -5441,3 +5441,10 @@ QemuOptsList qemu_mon_opts = { { /* end of list */ } }, }; + +#ifndef TARGET_I386 +void qmp_rtc_reset_reinjection(Error **errp) +{ + error_set(errp, QERR_FEATURE_DISABLED, "rtc-reset-reinjection"); +} +#endif diff --git a/qapi-schema.json b/qapi-schema.json index a83befc05b..b11aad2068 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -3468,3 +3468,15 @@ ## { 'enum': 'GuestPanicAction', 'data': [ 'pause' ] } + +## +# @rtc-reset-reinjection +# +# This command will reset the RTC interrupt reinjection backlog. +# Can be used if another mechanism to synchronize guest time +# is in effect, for example QEMU guest agent's guest-set-time +# command. +# +# Since: 2.1 +## +{ 'command': 'rtc-reset-reinjection' } diff --git a/qmp-commands.hx b/qmp-commands.hx index 65218bc147..1ea18b22a3 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -3675,3 +3675,26 @@ Example: { "slot": "3", "slot-type": "DIMM", "source": 0, "status": 0} ]} EQMP + +#if defined TARGET_I386 + { + .name = "rtc-reset-reinjection", + .args_type = "", + .mhandler.cmd_new = qmp_marshal_input_rtc_reset_reinjection, + }, +#endif + +SQMP +rtc-reset-reinjection +--------------------- + +Reset the RTC interrupt reinjection backlog. + +Arguments: None. + +Example: + +-> { "execute": "rtc-reset-reinjection" } +<- { "return": {} } + +EQMP |